.travis.yml in fluent-plugin-newsyslog-0.1.1 vs .travis.yml in fluent-plugin-newsyslog-0.1.2

@@ -1,8 +1,9 @@
 language: ruby
 rvm:
-  - 2.3.0
+  - 2.4.0
+  - 2.3.3
   - 2.2
   - 2.1
-  - 2.0.0
+
 before_install:
   - gem install bundler
\ No newline at end of file